Josef wtjkm



J. WURM.

LOCK AND LATCH COMBINED.

Patented Apr. 7, 1885'.

Ynvvwto Y Joaof 'Wwvw 3- 'hks 'WW'weeae/a @m JAV journaled to rotate ina circular orifice in the bottom of the spindle F is a flat projection,j,

50 The hub G is formed with a cam, 1, which acts in the county and Stateof New York, have inm, Fig. 1. Fig. 3 is a transverse section in theUNITED I STATES r JosnF WUBM, on new YORK, n. Y.

LocK AND LATCH COMBINED.

SPECIFICATION forming part of Letters Patent No. 315,456, dated April'7, 1885. Application no.1 November 13, um. (Model) To all whom it mayconcern:

Be it known that I, J osnn WURM, a citizen of the German Empire,residing at New York,

vented new and useful Improvements in Locks, of whichthe; following isaspecification.

The invention relates to improvements in looks and latches; and itconsists in the novel combination of devices hereinafter described andclaimed, reference being made to the accompanying drawings, in which-Figure l is a longitudinal section of my improved lock as applied to adoor. Fig. 2 is a transverse section of the same in the plane a:

plane 00' as, Fig. 1. Fig. 4 is an end elevation of part of my lock.

Similar letters indicate corresponding parts.

In the drawings, the letter A, Fig. 1, designates the door-knob on theoutside of the door, and B the knob on the inside. In the top of theoutsideknob, A, is screwed or otherwise secured a disk, a, with which iscast integral a tumbler, C, said tumbler being provided with two wards,b and 0. Dis a barrel or cylinder constituting what I will term atumbler hub, having a reduced outer end, which is disk at, thistumbler-hub having a longitudinal slot or key-hole, d, for the receptionof the flat key E. At the end of the slot d metal may be left to form award or wards, 6, so as to allow only the introduction of the properkey. 'The tumbler-hub D is also formed with a deep transverse recess, f,and two shortlongitudinal notches, g g, which notches end in thetransverse recess f.

F is a cylindrical spindle capable of rotating in the stem of the knobA, and provided at its outer end with an annular recess, h, and a slot,h, for the reception of the key E. In the annular recess h is fitted aspiral spring, "5, which abuts against the bottom of said recess h, andacts upon the tumbler-hub D, forcing the same continually in the outwardposition against the disk at 'on the knob A. On the which engages acorresponding slot, j, in a hub, G, which has bearings b in the casingI.

nular slots r in the casing upon a circular projection, Z, secured tothe arms in of the hollow bolt H, the bolt being constantly kept drawnback by the spring a, which is secured at one end to a screw or post, a,attached to the inside of the lock-case beside the hollow bolt, the rearfree end of the spring. acting against the plate which isprovided withthe circular projection Z. I I I F is a spindle which extends throughthe inside knob, B, having secured to it on its outer end a handle orkey, 0, and has on its inside end a projection, 19, which engagesgacorresponding recess, 12, in the hub G. The spindle F passes through adisk, a, secured in the knob B, and is thus held in position capable ofaxial rotation. I I

On the inside end of each of the two knobs I A B is a projection, q,extending through an- L is the latch, inclosed in the hollow bolt, andconsists in a stem, 8, to which is attached a fork, 8, having four arms,15 t. One arm, t, on the top, and one, t, on the bottom in the sameline, are provided each with a projection, a, which projections u areengaged, re- 75- spectively, by the projections g on the knobs A B. Thelatch L is kept constantly pressed I forward by the spring 12, securedto the cas-, ing I, encircling the post 1), secured in the casing andabutting against the latch.

tation independently of any rotation of the f knob-spindles F F. Whenthe parts are in the position shown in the drawings,the ward c on thetumbler O engages the longitudinal notch g in the tumbler-hub D and thetumbler-hub cannot be rotated.

If it is desired to throw forwardlthe bolt 93 that is to lock the doorfrom the outside, the key E is slipped in the key-hole d and pressed Idownward, a slot in the key allowing the same to pass some distance outat the end of the tumbler-hub before it is carried downroc PATENTOFFICE. I

8;) I M M are knob-roses partially countersunk ward, and the key entersthe slot h in the spindle. The notches g on the tumbler-hub are nowcleared of the ward c and can be turned, whereby the key can turn thespin- 5 dle F, and the cam Z on the hub G forces the To unlock the doorfrom the inside it is necessary only to turn the key or handle in therequired direction, the spindle F then acting on the hub G, carrying thecam Z, which then I engages the bolt H.

In the drawings the door is shown latched. To unlatch the same one ofthe knobs is turned in the proper direction. The projection qthereofengages the corresponding projection, u, on the arm of the latch, andthis draws the latch back against the action of the spring When the knobis released, the latch flies forward again, as in case of any ordinarylock.

By the combination of parts as herein described I obtain a lockrequiring no extra key-hole in the lock-case for the bolt, while itanswers all the purposes of alock and latch r combined.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination of a lock-case, a hollow sliding bolt, a latchsliding within the bolt, a rotating hub acting on the bolt, two rotatingand independent knob spindles connected with the hub to project thebolt, and two knobs independently rotating on the spindles and connectedwith the latch for retracting it within the bolt.

2. The combination of a lock-case, a hollow 4o sliding bolt, a springnormally holding the bolt retracted, a latch sliding in the bolt, aspring normally holding the latch projected, a rotating hub having a camfor projecting the bolt, two rotating and independent knob-spin- 5 dlesconnected with the hub, and each having a device at its outer end forits rotation, and two knobs independently rotating on the spindles andconnected with the latch for retracting it within the bolt,substantially as described.

3. The combination of a loclccase, a sliding bolt, a hub for projectingthe bolt, two rotating and independent spindles connected with the bolt,and the outside spindle having a slotin its outer end, alongitudinally-movable tum- 5 bier-hub adapted to rotatein the outsideknob, astationary tumbler fixed to the knob, and a key for moving thetumbler-hub inward and disengaging it from the stationary tumbler of theknob, substantially as described.

4. The combination, with alock-case', a sliding bolt, and a rotating hubacting on the bolt, of two rotating and independent knob-spin dlesconnected with the hub, the outside spindle having an annular recess,71/, anda slot, h, 15 in its outer end, a spring arranged in the annularrecess, a longitudinally-movable tumbler-hub journaled to rotate in theoutside knob and acted on by the spring, a stationary tumbler rigid onthe outer knob, and a key 0 for moving the tumbler-hub inward todisengage it from the tumbler of the knob, substantially as described.

5. The combination of a lock-case, a sliding hollow bolt, a rotating hubhaving a cam for 7 5 projecting the bolt, a latch sliding in the boltand having arms t t t t, the latter provided. with the projections a,two rotating and independent spindles connected with the hub, and twoknobs rotating on the spindles, and each having a projection, g, at itsinner end acting on the projections of the arms of the latch,substantially as described.

In testimony whereof I have hereunto set my hand and seal in thepresence of two subscribing witnesses.

JOSEF \VURM. [L. s]

lVit-nesses:

W. HAUFF, E. F. IQLSTENHUBER.

